Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a659d9164f8f9bfd6c642fdbeb7e2093c21e4bd704f422f584ae406a44370203' 
  AND token = '97P9NZqjm9m7NwurtNVfAZHmUwVpaxjyCtAl+ztx0kY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}